Results 21 to 30 of about 2,215 (138)
An evaluation of the performance of IEEE 802.11a and 802.11g wireless local area networks in a corporate office environment [PDF]
, 2003 In recent years there has been considerable interest in the development of standards for wireless local area networks. In particular, IEEE's 802.11a and 802.11g both employ coded orthogonal frequency division multiplexing (COFDM) but operate in different
Armour, SMD +4 more
core +2 more sources
Interactive Digital Terrestrial Television: The Interoperability Challenge in Brazil
International Journal of Digital Multimedia Broadcasting, Volume 2009, Issue 1, 2009., 2009 This paper introduces different standards implemented in existing Digital Terrestrial Television Broadcasting systems to allow the fruition of interactive services and applications through digital Set Top Boxes. It focuses on the interoperability issue between the Brazilian and the European architectures.
Jordi Amatller Clarasó +5 more
wiley +1 more source
Performance evaluation of channel estimation techniques in a multiple antenna OFDM system [PDF]
, 2003 A number of pilot-based channel estimation techniques are investigated for a multiple antenna system using the zero-forcing algorithm. The techniques are tested in typical indoor and outdoor (vehicular) channels.
Dowler, ASH, Nix, AR
core +1 more source
Advances in Multimedia, Volume 2007, Issue 1, 2007., 2007 We are on the threshold of a mediamorphosis that will revolutionize the way we interact with our TV sets. The combination between interactive digital TV (IDTV) and the Web fosters the development of new interactive multimedia services enjoyable even through a TV screen and a remote control.
Stefano Ferretti +3 more
wiley +1 more source
Enhancing MB-OFDM throughput with dual circular 32-QAM [PDF]
, 2008 Quadrature Phase Shift Keying (QPSK) and Dual Carrier Modulation (DCM) are currently used as the modulation schemes for Multiband Orthogonal Frequency Division Multiplexing (MB-OFDM) in the ECMA-368 defined Ultra-Wideband (UWB) radio platform.
Sherratt, R.S., Yang, R.
core +1 more source
Viterbi decoding strategies for 5 GHz wireless LAN systems [PDF]
, 2001 Standards for the operation of wireless local area network (WLAN) technology in the 5 GHz band have been developed in Europe, North America and Japan. These systems employ orthogonal frequency division multiplexing (OFDM) technology, and utilize forward ...
Armour, SMD +4 more
core +2 more sources
Terrestrial Broadcast Transmission of Digital HDTV Signals
Tongxin xuebao, 1995 With a brief discussion of the fundamental requirement of FCC（U.S.A）on the terrestrial broadcast transmission of digitized HDTV,propertties and techniques of some proposals of U.
姚庆栋, 仇佩亮, 王匡
doaj +2 more sources
, 2011 This paper is a thorough study of a digital broadcasting system adapted to the small mountainous island of Mauritius. A digital LAN was designed with MPEG-2 signals. The compressed signals were transmitted using DVB-T and QAM modulators.
Armoogum, Sheeba +2 more
core +1 more source
Performance of COFDM using turbo codes [PDF]
Engineering Solutions for the Next Millennium. 1999 IEEE Canadian Conference on Electrical and Computer Engineering (Cat. No.99TH8411), 2003 In this paper, we discuss and present simulation results for the performances of COFDM systems using turbo codes and operating in a mobile radio environment. Results show that the echo power has a much stronger influence than the guard time interval or echo delay. This scheme is shown to be an excellent solution for transmission over bandlimited mobile
L. Sylla, P. Fortier, H.T. Huynh
openaire +1 more source
Frame delay and loss analysis for video transmission over time-correlated 802.11A/G channels [PDF]
, 2007 This paper presents simulation results for the transmission of unicast MAC frames over 802.11a/g. Fading channel models at various Doppler frequencies are developed to generate time- correlated SNR waveforms.
Bull, David +4 more
core +1 more source